Weltrend Semiconductor, Inc.
24
2
2F, No. 24, Industry E. 9
th
RD., Science-Based Industrial Park, Hsin-Chu, Taiwan
TEL:886-3-5780241 FAX:886-3-5794278.5770419
Email:support@weltrend.com.tw
WT7513
GENERAL DESCRIPTION
The WT7513 provides protection circuits, power good output(PGO), fault protection latch(FPOB),
and a protection detector function (PSONB) control. It can minimize external components of switching
power supply systems in personal computer.
The Over Voltage Detector(OVD) monitors 3.3V, 5V, 12V input voltage level. The Over Current
Detector (OCD) monitor IS33, IS5, IS12 input current sense :
(1).When OVD or OCD detect the fault voltage level or current sense, the FPOB is latched HIGH.
The PSONB will resets the fault protection latch from LOW to HIGH.
(2).When OVD and OCD and UVD detect the right voltage level, the power good output(PGO) from
LOW to HIGH will be issue.
Add an external resistor between RI pin and GND pin to get an accurate current IRI.
FEATURES
The Over Voltage Detector(OVD) monitors 3.3V, 5V, 12V input voltage level.
The Over Current Detector (OCD) monitor IS33, IS5, IS12 input current sense.
Provide OVD/OCD and lock out for input voltage 3.3V, 5V, 12V
Both of the power good output(PGO) & fault protection latch(FPOB) with Open Drain Output Stage.
300 ms time delay for PGO.
38 ms for PSONB input signal Debounce.
73 us for internal signal De-glitches.
1.2 ms time delay for PSONB turn-off FPOB.
PIN CONFIGURATION
WT7513-N141WT WT7513-N140WT
WT7513
Weltrend Semiconductor, Inc.
Page 2
WT7513-N142WT
ORDERING INFORMATION
Device
Package
WT7513-N140WT
DIP-14
WT7513-N141WT
DIP-14
WT7513-N142WT
DIP-14
PIN DESCRIPTION
Pin Name
TYPE
Description
PGI
I
Power good input signal pin
GND
P
Ground
FPOB
O
Fault protection output pin, open drain output
PSONB
I
On/Off switch input
IS12
I
12V over current protection sense input
RI
I
Current sense adjust input
VCC2
I
Current sense power supply
IS5
I
5V over current protection sense input
IS33
I
3.3V over current protection sense input
VS12
I
12V over voltage detect input pin
VS33
I
3.3V over voltage/under voltage input pin
VS5
I
5V over voltage/under voltage input pin
VCC
I
Power supply
PGO
O
Power good output signal pin, open drain output
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